Keeping PUR Glue at Bay
Most modern book binders use very powerful PUR adhesives to glue the spines of the books.
PUR adhesive (Polyurethane Reactive) is heated to the required processing temperature in a glue basin and applied to the spines of the books using multiple coating rolls. Once applied onto the spine by the application rolls the pages are placed up against the spine. The hot adhesive cools and sticks the pages to the spine.
At the end of the working day, the equipment is shut down and the adhesive cools off and hardens. Extensive mechanical effort is required to remove the residue. Valuable time is wasted cleaning the glue basin, coating rolls, and associated scrapers and guides. Cleaning normally has to be done on a daily basis before the book binder is started up and the cleaning process will damage the rolls and basin over time.
The application of Impreglon coatings considerably improves the non-stick properties of glue basins and coating rolls. The hardened adhesive residue can peeled off the basin and roll by hand, and the machine is quickly ready for use again. The benefits are drastically reduced cleaning times and machine downtime. Plus the rolls and glue basins are not damaged.